Preparation method for modified sepiolite and application of sepiolite in environmental restoration

A sepiolite and modification technology, applied in the field of preparation of modified sepiolite, can solve the problems of complex process, insufficient environmental protection and high preparation cost, and achieve the effects of less dosage, easy promotion and good effect.

Active Publication Date: 2017-04-26
YONKER ENVIRONMENTAL PROTECTION
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

2016104067230 discloses a preparation method and application of modified sepiolite powder. The modification method requires the use of organic solvents and acid solutions, which is not environmentally friendly; the process is comp

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  • Preparation method for modified sepiolite and application of sepiolite in environmental restoration
  • Preparation method for modified sepiolite and application of sepiolite in environmental restoration
  • Preparation method for modified sepiolite and application of sepiolite in environmental restoration

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Embodiment

[0024] This embodiment provides a method for preparing an organically modified sepiolite heavy metal cadmium adsorbent, comprising the following steps:

[0025] a. Mix 10g of natural sepiolite with deionized water at a mass ratio of 1:20, stir to form a sepiolite suspension and let stand for 24 hours to swell the sepiolite.

[0026] b. Add 1.0 g of sodium diethyldithiocarbamate into the above swollen solution, stir at 60° C. for 2 h, and then continue stirring at room temperature for 24 h.

[0027] c. Put it in a funnel, wash the solid 6 times with deionized water until the filtrate does not contain sodium diethyldithiocarbamate, dry at 60°C for 12 h, and grind to obtain organically modified sepiolite.

[0028] Such as Figure 1a and Figure 1b As shown, 470 cm -1 is Mg-O, 670 cm -1 and 800 cm -1 It is Si-O, 3676cm -1 and 3627cm -1 is-OH, 3450 cm -1 It is zeolite water, 1040cm -1 is the Si-O-Si vibration peak. 1372cm -1 and 1500cm -1 are the unique C-S and C-N vi...

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Abstract

The invention discloses a preparation method for modified sepiolite and an application of the sepiolite in environmental restoration. The preparation method for the modified sepiolite comprises the following steps of (1) enabling natural sepiolite and deionized water to be mixed at a mass ratio of 1 to (10-50), stirring to form a sepiolite turbid liquid, and standing for 6-24h; (2) adding sodium diethyldithiocarbamate into the solution obtained in the step (1) and stirring, wherein the mass ratio of sodium diethyldithiocarbamate to sepiolite is (0.05-0.3) to 1; and (3) performing solid-liquid separation on the stirred solution, washing the solid body by deionized water, and drying and grinding to obtain the modified sepiolite.

Description

technical field [0001] The invention relates to a preparation method of modified sepiolite and its application in environmental restoration, belonging to the technical field of preparation of heavy metal cadmium adsorption materials. Background technique [0002] In recent years, with the development of industry and mining, heavy metals have greatly increased in quantity and variety, and a large area of ​​farmland has been polluted by heavy metals. Hunan Province is known as the "Hometown of Non-ferrous Metals". In addition, most of the farmland in the south is acidic, which is conducive to the dissolution and migration of heavy metals. The cadmium rice incident caused by farmland cadmium pollution has shocked the whole country, and farmland heavy metal pollution has become one of the most serious environmental problems, seriously threatening the quality and safety of agricultural products and the stability of agricultural regional ecosystems. The treatment of heavy metals ...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30C02F1/28B09C1/00C02F101/20
CPCB01J20/12B01J20/22B09C1/00C02F1/285C02F2101/20
Inventor 贺前锋符云聪赵瑰施刘代欢刘晨张义
Owner YONKER ENVIRONMENTAL PROTECTION
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